Volkswagen of America has announced the official pricing for the 2013 Jetta Hybrid. The official price for the base Jetta Hybrid will be $24,995 with an SE model starting at $26,990. Volkswagen says that the hybrid version of the Jetta will be the most fuel-efficient Jetta in the lineup with an estimated combined fuel economy rating of 45 mpg.

The car is also the first hybrid in the world to use a seven-speed dual-clutch automatic transmission. The car will also be the fastest compact hybrid in its class with an estimated 0 to 60 mph time of less than nine seconds. The 2013 Jetta Hybrid is also able to drive on electricity alone at speeds of up to 44 mph for up to 1.2 miles depending on operating conditions.

The gasoline engine of the Jetta Hybrid is a 1.4-liter turbocharged TSI engine combined with 27-HP electric motor -- total system output is listed at 170hp and 184 lb-ft of torque. The vehicle in base form will feature front and rear disc brakes, daytime running lights, power heated exterior mirrors, 15-inch wheels, rear spoiler, rear diffuser, and hybrid badging. The car will also have power windows and six way manually adjustable seats along with air-conditioning. The base model also features integrated Bluetooth technology and a CD player with six speakers.

The SE version of the vehicle includes all the base model features and adds LED tail lights, power reclining front seats, a media-device interface with an iPod cable (Lightning perhaps?), and a premium touchscreen radio along with keyless entry and start. The high-end hybrid SEL will sell for $29,325 and adds a sunroof, navigation system, heated front seats, and more. Volkswagen's top-of-the-line Jetta Hybrid, the SEL Premium, will start at $31,180.

The SEL Premium version gets the hardware from the SEL plus navigation, LED daytime running lights, and active front light system, bi-xenon headlights, 17-inch wheels, and a premium audio system and more.

There is a reason you don't see hybrid diesel engines in typical vehicles (you see them on buses, but for different reasons) and that is simply because most of the fuel efficiency of the petrol engine is gained by reducing the combustion amount using a miller cycle compression technique. The miller cycle reduces torque at the expense of increased fuel economy, and traditionally this torque was made up for with a supercharger (think old Mazda 929's) but the technology works substantially better when paired with a high torque electric motor to pickup for the reduced low end torque of engine.

The miller cycle can not be applied to diesels because of the way they use compression for detonation. I'm sure you can read why on wikipedia...but your basic answer is hybrid technology paired to a small diesel engine won't improve your fuel economy at all. It will simply increase weight and increase wear on the diesel engine (especially constant stopping/starting)